People within the same party don't necessarily hold exactly the same views. At this point, that's especially prevalent within the Democratic Party because over the last few years the Democrats have generally been more accepting of variation in their members' views (whereas Republicans who disagree with the party line tend to end up losing their jobs or being ostracized by the party--see US Senators Michael Bennett and Lisa Murkowski, Florida Governor Charlie Crist, Representative Mike Castle, etc.) At other points in US history the reverse has been true, but there is still always some level of disagreement among different members of the party, so there's bound to be some conflict.
Because it will make the President and Congress compete for power
Refer to: What are the main causes of conflict between the President and Congress?
Members of Congress often have ideas very different from the president about what constitutes desirable public policy.
The President is of the Executive branch and the Congress is of the Legislative branch.
Frustrated by Johnson's actions, Congress proposed the Fourteenth Amendment to the states, and the amendment was ratified in 1868. As the conflict between the branches of government grew, Congress passed the Tenure of Office Act, restricting Johnson's ability to fire Cabinet officials.
The president has to pass his political agenda through Congress within 4 years.
power is distributed among the three independent branches of government~
The system of checks and balances makes it likely that the president and Congress will always compete for power. Which branch will dominate in any specific period depends on many factors, including the politicial issues at the time and the leaders in Congress and the executive branch.
Legislative (Congress) , Judicial (Supreme Court), and Executive (President) -Super Llama
congress
It showed how powerful Congress was compared to the president. or It put them in conflict with President Johnson.
The three branches are Congress (Legislative), Executive (President) and the Judiciary (Supreme court and lower courts)